We had an inspection agency that was giving us a hard time about using buchanan crimps in junction boxes because they aren't rated for outdoor/damp locations. The point was made (on this listserve) that "*if the inside of a 3R enclosure isn't considered dry enough for a buchanan crimp/cap, then there's millions of 3R panels with breakers and busbars in them that would have the same problem*". The inspection agency finally relented. We put a little No-Alox in the cap. I know that's not what your initial post was about, but tossing that in for consideration just in case...
Adam Katzman (he/him) Autonomous Energies | Owner/Operator www.AutonomousEnergies.com <http://www.autonomousenergies.com> (518) 567-1468 On Tue, Nov 11, 2025 at 3:51 PM Jay via RE-wrenches < [email protected]> wrote: > Hi Sam > > I can’t imagine being just copper it would matter, the AHJ might have a > different opinion however > > Question. > How are you insulating them? > > Jay > > > On Nov 11, 2025, at 11:15 AM, Sam Haraldson via RE-wrenches < > [email protected]> wrote: > > > Wrenches, > > On the attached product spec sheet for Ideal Copper Crimps (aka Buchanan > crimps) you'll see that max voltage for the crimp is rated at 600V but an > asterisk indicates up to 1000V when "in fixtures and signs". In our > application this is a 1000v system and we are joining pairs of #10 PV > wires. The junctions are made in a rail-mounted, plastic j-box. We could > not find the definition of "fixture" as it might pertain to this situation > in the NEC and as such are interested to learn more about using Buchanan > crimps for 1000V applications. > > <image.png> > > > Cheers, > Sam > > [image: OnSite Energy] <https://onsiteenergyinc.com/> > > Sam Haraldson > Operations Specialist > (406) 551-6135 > 1515 N. Rouse Ave Bozeman, MT 59715 > Locally owned and operated since 2012 > [image: B Corporation] <https://onsiteenergyinc.com/bcorp> > <IDEALIndustries-Crimp Connectors.pdf> > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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